Added `open file.sth | to-sth` type examples Also did a format conversion example with `open jonathon.xml | to-json` in to-json.md
Partial fix of issue #711 Docs for the following commands were added - to-csv to-json to-toml to-tsv to-url to-yaml Docs for to-db , to-bson , to-sqlite have not been added as I don't recognize and understand those formats.